Cooling means for internal-combustion engines



. '161 ,614 m. 22, 1921. I P. WALTERS 8 COOLING MEANS FOR INTERNAL COMBUSTIONENGINE-S Filed Feb. 28, 1922 INVENTOR WITNESSES I I PERCY WALTERS.

ATTORNEYS- Patented Feb. 22, 1927.

UNITE PERCY VJALTE RS, OF YONKERS, NEW YORK.

COOLING MEANS FOR INTERNAL-COMBUSTION ENGINES.

, Application filed February 28, 1922. Serial No. 540,015.-

This invention relates to internal combustion engines and more particularly to cooling means therefor.

The object of the invention is to'provide a simple and durable means by which air may be drawn through the space existing between theordinary water jacket employed on most internal combustion engines and the cylinder walls of the engine and 1n this manner cool the engine.

It is also an object of the invention that the apparatus for drawing the air within the water jackets of engines be adapted to )8 operated by the crank shaft of the engine to which the same may be associated.

It is a further object of the invention that the apparatus be adapted to draw the air through the water jacket of an engine and expel the same to the atmosphere at high velocity.

Other objects relating to details of con struction will hereinafter appear.

The invention is illustrated by way of example in the accompanying drawings in which,

Figure 1 is a vertical longitudinal sectional view of an internal combustion engine to which the present invention has been applied.

Figure 2 is a detail sectional view illustrating the inlet valve employed for the water jacket.

Figure 3 is a detail sectional view illustrating the manner in which air is drawn from within the water jacket and expelled to the atmosphere.

Referring to the drawings more particularly, in Figure '1 I have shown in vertical section an internal combustion engine of the four cylinder type and in which E is the crank casing, S the crank shaft, C the cylinders and J the water acket surrounding said cylinders in the usual manner to provide a chamber and passages through which water or other cooling'medium may be circulated for cooling the engine.

In carrying out the invention there is provided an inlet valve generally indicated by the reference character V which is adapted to permit air to enter within the jacket 3 upon a predetermined amount of suction created within the jacket. Also there is provided a pump generally indicated by the reference character P which, when operated by the crank shaft S, is adapted, through the means of ,valves hereafter to be do scribed, to draw air from within the jacket J and then expel the same to the atmosphere.

Tie pump P consists in a cylinder which is formed upon the one end of the jacket J in any desirablemanner. Preferably the cylinder '10 is spaced from the jacket J and supported by suitable plates as at 11. The cylinder 10 should be formed with cooling fins as at 12'so that-any heat developed may be easily radiated. lVithin the cylinder end there is suitably mounted a piston 13 which is connected to the one end of the rod 14. The other end of the rod 14 has formed therein a semi-circular collar 15 which is secured to a complemental collar section 16-by bolts 17 or in any other suitable manner and thus forming a complete collar which is disposed about an eccentric 18 secured upon the shaft S. Upon rotation of the shaft S the eccentric will, of course, cause the piston 13 to reciprocate. The cylinder 10 is extended at its upper end to forma head '19 which is hollow and com :municates with the interior of the cylinder 10 as shown and which has mounted therein an exhaust valve which consists in a valve member 20 adapted to form a closure for the passageway 21 extending through the head 19 of the cylinder 10. The valve member 20 has a suitable stem formed therewith as at 22 and which is held by an arm 23 for longitudinal movement. As is obvious the weight of the valve 20 will norma ly retain the same in its seated position to close the passage 21 and upon a predetermined amount of air pressure being exerted beneath the valve member 20 the same will rise to permit the admission of air from the passage 21.

Also there is mounted in the head 19 of the cylinder 10 a second valve member 2a which is adapted, when moved upwardly, to seat for closing the passage in the head 19 which communicates with the pipe coupling 25 and when moved downwardly to open thesame passage. The valve member 24: has its stem encircled by a pressure spring 26 adapted to hold its valve in this closed position and further adapted to yield sufiiciently to permit the valve to move down wardly and in its open position when a predetermined amount of suction is created in the cylinder head '19. The pipe 25 in turn communicates with a suitable casting as at member 31.

ciproca'ted and in doing so \v'ill draw E26 which is preferably of the shape shown and which is hollow and coniinunioates with the space existing Within the jacket J.

The inlet valve V is supported by a short pipe section 28 preferably being curved up- Wardly as shown and having a gauge 29 which supports the stem 3() ol. the valve A spring 32 encircles the stem 30 and normally holds. the valve 331 in its closed position until a predetermined amount of suction is created tlierebencath to draw thesainedownwardly. The lttllSltm oi sprin 32 may be regulated by his nut threa ed upon stem 30. Also the stein of valve 24 carriesa like not for regulating ten-- sion of associated )ring 26'.

Inthe operationo this device upon the engine being started the piston 13 will be rean from within the jacket J theva'lve Elia)- erating to permit this action. The drawin of the air from ivithin the jacket J will ot conrsecreate a suction beneath the inlet valve V and operate the same to relill ihe space within the jacket J with air,and this in turn Will be again sucked Ont or Withdrawn by the aition of the piston 13. Upon drawing: the air from Within the jacket J the piston will upon its upiihrd stroke force this air to be discharged through the passage 21 by raising the valve nienlbeifflo. Oi colirsc as is shown, npoh the downward stroke of the piston 13 the valve member 20 will acat itself and close/the passage 21.

\Vhile I have liereinsliown and (lPStfl'lllttl only one form of device embodyinn my ini i J 0 o l l i vention, it 1s to be understood that Various changes and inodihcations may be made herein Without departing from the spirit of the invention or the spirit and scope of the appended claims.

\Vhat I claim is:

1. An internal combustion engine including Working cylinders and cooling jackets enclosing the cylinders, said jackets having an inlet and an outlet, means including a pump chamber imlependent of said jackets and comnmnicati11g with the said outlet, a reciprocating pnn'ip operating in said ('llillllher to cause suction tl'ierein and in the jackets during one stroke of the pnrnp, and regnlable valves controlling the inlet and out lot of said jackets whereby to nodnce a partial vacuum in said jacket, and to break said vacuum and causcai'r to pass tliroueh the jacket during the suction stroke of the pump when such suction overcomes the regulable valve controlling the inlet.

2. Ah interiial combustion engine includingcj-"linders and a cooling jacket enclosing the same, said jacket having an inlet and ontlet means inchiding a chamber adjacent said outlet, a reciprocating pinnp adapted to cause a suction within theohamber and within the j acket during one stroke thereof and compression within said chamber during its other stroke. re t'ulal'ile valves controlling said inlet and. outlet oi? the jacket whereby air will be drawn through the jacket only d urine the suction stroke of the pump and an exhaust valve controlling the pump chamber whereby to exhaust air from the chamber only (lHlll'lQ the compression stroke of the pump.

rlnnor WALIEBS. 

